506498821 has 2 divisors, whose sum is σ = 506498822. Its totient is φ = 506498820.

The previous prime is 506498803. The next prime is 506498851. The reversal of 506498821 is 128894605.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427910596 + 78588225 = 20686^2 + 8865^2 .

It is a cyclic number.

It is not a de Polignac number, because 506498821 - 2¹¹ = 506496773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506498851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253249410 + 253249411.

It is an arithmetic number, because the mean of its divisors is an integer number (253249411).

Almost surely, 2^506498821 is an apocalyptic number.

It is an amenable number.

506498821 is a deficient number, since it is larger than the sum of its proper divisors (1).

506498821 is an equidigital number, since it uses as much as digits as its factorization.

506498821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 506498821 is about 22505.5286763053. The cubic root of 506498821 is about 797.1244792131.

The spelling of 506498821 in words is "five hundred six million, four hundred ninety-eight thousand, eight hundred twenty-one".